Try not using SSH. You can try your password or a personal access key. Follow these step(s):

1. Run git clone https://github.com/kortina/dotfiles/. When it asks for your username, provide it. When asked for your password, provide it. Or use the personal access token as shown in the other way below.

Another way:

1. Make a classic personal access token, or a fine grained personal access token.
2. Follow these steps to use it on the command line.